Rather than give my personal address here, you can contact me via the address given in the image below. This is not a link, unfortunately you will have to type the address yourself. It's presented this way to avoid spam:
If you can't see the image or are using a speech system, I'll describe the address for you: it's the word 'credit', followed by a hyphen (ie a minus sign), then the word 'calculators', then the 'at' symbol, then the word 'beeb' (that's b e e b), then a dot, and finally the word 'net'.
Note: the former address, which contained the word 'programs' rather than 'calculators' has been receiving a certain amount of spam (I suspect because it was inadvertently placed on a government site at a time when there was a spate of attacks on such sites) and has been suspended for the time being.